EP 0469821 A2 19920205 - Switch mode power supply.
Title (en)
Switch mode power supply.
Title (de)
Schaltnetzteil.
Title (fr)
Alimentation à découpage.
Publication
Application
Priority
JP 20527390 A 19900803
Abstract (en)
A switch mode power supply comprises a drive circuit (7) for generating first and second switching signals in response to first and second input signals of different frequencies, and a switching regulator (9) for generating one or more regulated power supply output voltages in response to the first and second switching signals. The power supply further comprises a control circuit (3,4,6,10,15) for determining, in response to the first and second input pulse signals, a first frequency range containing the frequencies of the first and second input signals when respectively multiplied by first and second integer multiples that is narrower than a second frequency range containing the frequencies of the first and second input signals when each multiplied by a common integer multiple. The control circuit (3,4,6,10,15) configures the drive circuit (7) to generate the first switching signal at a frequency which is the first integer multiple of the frequency of the first input pulse signal and the second switching signal at a frequency which is the second integer multiple of the frequency of the second input pulse signal in such a manner that the frequencies of the first and second switching signals are within the first range. <IMAGE>
IPC 1-7
IPC 8 full level
H04N 5/63 (2006.01); G09G 1/00 (2006.01); G09G 1/04 (2006.01); G09G 1/16 (2006.01); H02M 3/28 (2006.01); H02M 3/335 (2006.01); H04N 3/185 (2006.01)
CPC (source: EP US)
H02M 3/33507 (2013.01 - EP US); H04N 3/185 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0469821 A2 19920205; EP 0469821 A3 19920506; EP 0469821 B1 19941130; DE 69105400 D1 19950112; DE 69105400 T2 19950608; JP H0491579 A 19920325; JP H0769670 B2 19950731; US 5132891 A 19920721
DOCDB simple family (application)
EP 91306914 A 19910729; DE 69105400 T 19910729; JP 20527390 A 19900803; US 72246291 A 19910627